CN112994355A - Air-water cooling high-power permanent magnet traction motor with hanging structure - Google Patents
Air-water cooling high-power permanent magnet traction motor with hanging structure Download PDFInfo
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- CN112994355A CN112994355A CN201911271502.7A CN201911271502A CN112994355A CN 112994355 A CN112994355 A CN 112994355A CN 201911271502 A CN201911271502 A CN 201911271502A CN 112994355 A CN112994355 A CN 112994355A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The embodiment of the invention provides an air-water cooling high-power permanent magnet traction motor with a hanging structure, which comprises a machine shell, a stator assembly and a rotor assembly, wherein the machine shell surrounds and forms an installation space for installing the stator assembly and the rotor assembly, the machine shell is formed with an air cooling channel communicated with the installation space, the rotor assembly comprises a rotating shaft, the rotating shaft drives blades on the rotating shaft to rotate when rotating, and then drives air in the installation space to flow into the air cooling channel, in the flowing process of the air, the heat of the high-temperature area in the installation channel is absorbed, and the heat is released to the low-temperature area, therefore, the heat distribution of each area in the installation channel is balanced, meanwhile, the air and the shell generate heat exchange when flowing in the air cooling channel, and the heat carried by the air is transferred and dissipated to the outside atmosphere through the shell, so that the uniform cooling of the inside of the high-power permanent magnet traction motor is realized.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a high-power permanent magnet traction motor.
Background
The traditional high-power permanent magnet traction motor is mainly used in the operation of a railway vehicle, and comprises a shell, a stator, a rotor and a main shaft, wherein the stator is arranged on the inner wall of the shell, the rotor is in transmission connection with the main shaft, and the rotor is arranged inside the stator; when the motor is electrified, the rotor rotates to further drive the main shaft to rotate, and a large amount of heat can be generated inside the motor in the operation process.
In the related art, in order to avoid the excessive temperature caused by the heat accumulation generated during the operation of the high-power permanent magnet traction motor, a cooling channel is often arranged between the inner wall and the outer wall of the housing, a first opening of the cooling channel is arranged on the outer wall of the housing, and a second opening of the cooling channel is arranged at the front end of the housing along the direction parallel to the axis of the main shaft. And when the motor works, the ventilation device drives air to enter the cooling air channel from the first opening and flow out from the second opening so as to cool the motor.
However, the heat distribution inside the motor is not uniform, and the overall uniform cooling of the motor cannot be realized by adopting the existing cooling mode.
Disclosure of Invention
The embodiment of the invention provides an air-water cooling high-power permanent magnet traction motor with a hanging structure, which is used for solving the technical problems that the heat distribution in the existing motor is not uniform, and the whole motor cannot be uniformly cooled by adopting the existing cooling mode.
The embodiment of the invention provides an air-water cooling high-power permanent magnet traction motor with a hanging structure, which comprises a shell, a stator assembly and a rotor assembly; the machine shell surrounds and forms an installation space for installing the stator assembly and the rotor assembly, and an air cooling channel communicated with the installation space is formed in the machine shell; the rotor assembly comprises a rotating shaft, and blades for driving air in the installation space to flow to the air cooling channel are arranged on the rotating shaft.
The permanent magnet traction motor is characterized in that the casing is provided with a water cooling channel which can exchange heat with the air cooling channel, and a water inlet and a water outlet which are communicated with the water cooling channel to enter and exit cooling water.
In the permanent magnet traction motor, a water channel rib is provided in the water cooling channel to extend the cooling water circulation path.
The permanent magnet traction motor comprises a rotating shaft, a water cooling channel, an air cooling channel and a permanent magnet traction motor, wherein the rotating shaft is arranged on the rotating shaft, the water cooling channel is an annular channel surrounding the rotating shaft, and the air cooling channel is arranged on the outer side of the water cooling channel.
The permanent magnet traction motor is characterized in that the outer side of the air cooling channel is connected with a hanger.
The permanent magnet traction motor is characterized in that the cross section of the casing perpendicular to the extending direction of the rotating shaft is a regular polygon, and the air cooling channel is arranged at four corners of the outer side of the water cooling channel.
The permanent magnet traction motor comprises a rotating shaft and a rotor body arranged on the rotating shaft, wherein the rotor body is provided with a plurality of first air channels which are communicated along the extending direction of the rotating shaft, and the first air channels surround the rotating shaft uniformly.
The permanent magnet traction motor is characterized in that the blades are axial flow blades, and a guide ring is arranged behind the axial flow blades in the airflow direction and guides airflow to flow towards the air cooling channel.
The permanent magnet traction motor comprises a casing, a bearing, a rotating shaft, a sealing cover, a cooling space and an air inlet channel, wherein the bearing is arranged at two ends of the rotating shaft through the bearing, the sealing cover is arranged on the rotating shaft and used for isolating the bearing from the installation space, the sealing cover and the casing form the cooling space surrounding the bearing, and the casing is provided with the air inlet channel and the air outlet channel which are communicated with the cooling space.
The permanent magnet traction motor as described above, wherein the sealing cover rotates with the rotating shaft and has a sheet-like protrusion for driving the air in the cooling space to flow.
The air-water cooling permanent magnet traction motor with the hanging structure comprises a machine shell, a stator assembly and a rotor assembly, wherein the machine shell surrounds to form an installation space for installing the stator assembly and the rotor assembly, the machine shell is provided with an air cooling channel communicated with the installation space, the rotor assembly comprises a rotating shaft, the rotating shaft drives blades on the rotating shaft to rotate when rotating, so that air in the installation space is driven to flow into the air cooling channel, in the flowing process of the air, the heat in a high-temperature area in the installation channel is absorbed, and the heat is released to a low-temperature area, so that the heat distribution of each area in the installation channel is balanced, meanwhile, the air and the machine shell generate heat exchange when flowing in the air cooling channel, the heat carried by the air is transferred and dissipated to the outside atmosphere through the machine shell, and therefore, the uniform cooling of the interior of the motor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a permanent magnet traction motor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a stator assembly provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention;
FIG. 4 is a quarter sectional view of a housing provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a rotor sheet according to an embodiment of the present invention;
FIG. 6 is a first schematic view illustrating the installation of a hanger according to an embodiment of the present invention;
FIG. 7 is a second schematic view of the hanger according to the embodiment of the present invention;
FIG. 8 is a third schematic view illustrating the installation of a hanger according to an embodiment of the present invention;
fig. 9 is a partial schematic view of a bearing provided in an embodiment of the present invention.
Description of reference numerals:
1: a housing;
11: air cooling channels;
12: a first end cap;
13: a second end cap;
14: a first cavity;
15: a second cavity;
16: a water-cooling channel;
161: a water inlet;
162: a water outlet;
163: water channel ribs;
2: a stator assembly;
21: a stator core;
22: a stator winding;
3: a rotor assembly;
31: a rotating shaft;
311: a blade;
312: a guide ring;
32: rotor punching sheets;
321: a first mounting hole;
322: a second mounting hole;
323: a rotating shaft mounting hole;
33: a rotor body;
4: hanging;
5: a bearing;
51: a cooling space;
52: an air inlet channel;
53: an air outlet channel;
6: a sealing cover;
61: a sheet-like projection.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a permanent magnet traction motor according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a stator assembly provided in an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention; FIG. 4 is a quarter sectional view of a housing provided by an embodiment of the present invention; fig. 5 is a schematic structural diagram of a rotor sheet according to an embodiment of the present invention; FIG. 6 is a first schematic view illustrating the installation of a hanger according to an embodiment of the present invention; FIG. 7 is a second schematic view of the hanger according to the embodiment of the present invention; FIG. 8 is a third schematic view illustrating the installation of a hanger according to an embodiment of the present invention; fig. 9 is a partial schematic view of a bearing provided in an embodiment of the present invention.
Please refer to fig. 1 to 9. The embodiment provides an air-water cooling high-power permanent magnet traction motor with a hanging structure, which comprises a shell 1, a stator assembly 2 and a rotor assembly 3; the machine shell 1 surrounds and forms an installation space for installing the stator assembly 2 and the rotor assembly 3, and the machine shell 1 is also provided with an air cooling channel 11 which is communicated with the installation space; the rotor assembly 3 includes a rotating shaft 31, and the rotating shaft 31 is provided with a vane 311 for driving the air in the installation space to flow to the air-cooling duct 11.
The high-power permanent magnet traction motor provided by the embodiment is mainly used in the field of motor cars, and the high-speed motor car loaded with the high-power permanent magnet traction motor has the advantages of lower energy consumption, lower operation cost, higher traction power, obviously reduced noise of the whole car and greatly reduced pollution to the environment.
For example, the housing 1 of the high-power permanent magnet traction motor is firstly enclosed into an installation channel with openings at two ends, a first end cover 12 is installed at an opening at one end of the installation channel, a second end cover 13 is installed at an opening at the other end of the installation channel, the installation channel is further closed to form an installation space, and the first end cover 12 and the second end cover 13 can be connected with the housing 1 through bolts.
Install stator module 2 and rotor subassembly 3 in this installation space, wherein, stator module 2 is including surrounding the stator core 21 that rotor subassembly 3 set up and setting up the stator winding 22 on stator core 21, and stator core 21 is formed by the stack of multilayer silicon steel sheet, installs on casing 1 inner wall through the mode of hot jacket, and stator winding 22 adopts the Y type to connect.
The rotor assembly 3 comprises a rotor punching sheet 32, a permanent magnet, a rotating shaft 31, a rotor pressing ring and a permanent magnet pressing plate. As shown in fig. 5, a first mounting hole 321, a second mounting hole 322, and a rotating shaft mounting hole 323 are provided on the rotor sheet 32, the rotor sheet 32 is disposed on the rotating shaft 31 of the motor through the rotating shaft mounting hole 323, and a plurality of rotor sheets 32 are stacked to form a rotor core, and optionally, the rotor sheet 32 may also be made of silicon steel. The first mounting holes 321 and the second mounting holes 322 are symmetrically arranged along the diameter of the rotor core to form a group of V-shaped mounting holes, the V-shaped mounting holes are uniformly distributed along the circumferential direction of the rotor core, permanent magnets are mounted in each of the first mounting holes 321 and each of the second mounting holes 322, and optionally, the permanent magnets may be made of ferrite permanent magnet materials, such as barium ferrite, strontium ferrite, and the like; alternatively, alloy permanent magnet materials, such as ru fe — b permanent magnet alloy, alnico permanent magnet alloy, and samarium-cobalt permanent magnet alloy, may also be used, which is not limited in this embodiment. The magnetic poles between each adjacent permanent magnet need to be opposite, which is a basic condition for constructing a permanent magnet motor.
The specific principle of this embodiment for carrying out the even heat dissipation cooling to motor inside does:
the heat dissipation cooling process comprises two parts, and first part is the even distribution of heat in will installing space, specifically includes: stator module 2, rotor module 3 and first end cover 12 enclose and establish into first cavity 14, stator module 2, rotor module 3 and second end cover 13 enclose and establish into second cavity 15, be provided with the ventilation hole along rotor core circumference distribution on rotor core, the one end and the first cavity 14 intercommunication in ventilation hole, the other end and the 15 intercommunication of second cavity, 1 is provided with air cooling passageway 11 on the casing, this air cooling passageway 11's one end and first cavity 14 intercommunication, the other end and the 15 intercommunication of second cavity. The blades 311 arranged on the rotating shaft 31 drive air to flow in the first cavity 14, the air in the first cavity 14 flows into the ventilation holes on the rotor core, and then flows into the second cavity 15 through the ventilation holes, the air in the second cavity 15 then flows into the air cooling channel 11, and finally flows into the first cavity 14 through the air cooling channel 11, and continuously circulates, in the circulating process, the air contacts with the high-temperature component and absorbs heat, when the air passes through the low-temperature area, the absorbed heat is released, and then the heat at each position in the motor is redistributed through the air flow which continuously performs self-circulation, so that the temperature difference is balanced; after accomplishing heat balance, still include the second part, cool down to motor inside, specifically include: in the circulation process, when the air passes through the air cooling channel 11 on the casing 1, all can produce the heat exchange with the casing 1 inner wall, and then pass through casing 1 transmission with the heat and release to the external atmosphere in, realize the heat dissipation cooling, optionally, can also set up a plurality of fin in casing 1 outside, increase the heat radiating area of casing 1 and then improve the effect of heat dissipation cooling.
The high-power permanent magnet traction motor provided by the embodiment comprises a machine shell 1, a stator assembly 2 and a rotor assembly 3, wherein the machine shell 1 surrounds and forms an installation space for installing the stator assembly 2 and the rotor assembly 3, the machine shell 1 is formed with an air cooling channel 11 communicated with the installation space, the rotor assembly 3 comprises a rotating shaft 31, the rotating shaft 31 drives blades 311 on the rotating shaft 31 to rotate when rotating, and further drives air in the installation space to flow into the air cooling channel 11, in the flowing process of the air, the heat of the high-temperature area in the installation channel is absorbed, and the heat is released to the low-temperature area, therefore, the heat distribution of each area in the installation channel is balanced, meanwhile, the air and the machine shell 1 generate heat exchange when flowing in the air cooling channel 11, and the heat carried by the air is transferred and dissipated to the outside atmosphere through the machine shell 1, so that the uniform cooling of the interior of the motor is realized.
The cabinet 1 in this embodiment is provided with a water cooling channel 16 that can exchange heat with the air cooling channel 11, and a water inlet 161 and a water outlet 162 that communicate with the water cooling channel 16 to supply and discharge cooling water. Through setting up water-cooling channel 16, when the inside circulating air of motor passed through air-cooling channel 11 on the casing 1, the air except producing the heat exchange with the casing 1 inner wall that is located air-cooling channel 11, in with heat transfer to external atmosphere through casing 1, can also produce the heat exchange with between the water-cooling channel 16, and then with the heat transfer in the cooling water in the water-cooling channel 16, the cooling water carries the heat and flows out from delivery port 161, the efficiency of the inside cooling of motor has further been improved.
In a specific implementation, as shown in fig. 1, the water inlet 161 and the water outlet 162 are both disposed on an outer wall of the casing 1, the water outlet 161 is communicated with the water-cooling channel 16 through a water outlet pipe, and the water inlet 162 is communicated with the water-cooling channel 16 through a water inlet pipe. The inner wall of the casing 1 is provided with a water cooling channel 16, the water cooling channel 16 is separated from the air cooling channel 11 by a part of the inner wall of the casing 1, when air flows through the air cooling channel 11, the inner wall of the casing 1 located in the air cooling channel 11 absorbs air heat and transfers the air heat to cooling water in the water cooling channel 16, and the cooling water enters the water cooling channel 16 from the water inlet 161 and carries the heat to flow out from the water outlet 162.
In the present embodiment, a water passage rib 163 for extending a circulation path of the cooling water is provided inside the water cooling passage 16. Through setting up water course muscle 163, the effectual flow path that has increased the cooling water in water-cooling channel 16, flow path is longer, and the heat that the cooling water absorbed is more, and then has improved water-cooling channel 16's cooling effect.
The water cooling channel 16 is an annular channel surrounding the rotating shaft 31, and the air cooling channel 11 is arranged outside the water cooling channel 16. The water cooling channel 16 and the air cooling channel 11 are both arranged inside the motor casing 1, and noise generated by the water cooling channel 16 and the air cooling channel 11 is blocked by the casing 1, so that the noise of the high-power permanent magnet traction motor during ventilation and heat dissipation is reduced.
During the concrete implementation, be provided with annular channel on casing 1's the inner wall, annular channel encircles the setting of pivot 31, this annular channel communicates with the water inlet 161 and the delivery port 162 of cooling water respectively, thereby constitute water-cooling channel 16, stator core 21 installs in this annular channel one side towards pivot 31 through the connected mode of shrink fit, when cooling water flows in water-cooling channel 16, stator core 21's heat can also transmit to water-cooling channel 16 through this circular channel's inner wall, and then realize the cooling effect to stator core.
When the water cooling passage 16 is an annular passage surrounding the rotary shaft 31, the water passage ribs 163 may be arranged along the center line direction of the annular passage to form a zigzag cooling circuit. For convenience of explanation, the number of the water channel ribs 163 is set to three, and the center line of the water cooling passage 16 is set parallel to the horizontal plane: at this time, the water cooling channel 16 is equivalent to a horizontally disposed annular column, and the annular column is divided into three parts along the central line direction thereof, each part is a water cooling cavity, adjacent water cooling cavities are separated by the water channel rib 163, an opening is formed in the water channel rib 163, so that the adjacent water cooling cavities are communicated with each other, and the openings in the adjacent water channel ribs 163 are far away from each other. Illustratively, when the cooling water flows into the right end of the first water-cooling cavity from the water inlet 161, the cooling water flows along the central line direction of the water-cooling channel 16 inside the first water-cooling cavity, i.e. flows from right to left to the left of the first water-cooling cavity, flows into the second water-cooling cavity through the opening on the first water channel rib 163, flows from left to right to the right of the second water-cooling cavity inside the second water-cooling cavity, flows into the third water-cooling cavity through the opening on the second water channel rib 163, flows from right to left inside the third water-cooling cavity, and finally flows out from the water outlet 162, so that the cooling water continuously moves left and right inside the water-cooling channel, thereby forming a zigzag cooling loop.
It should be noted that, the number of the water channel ribs 163 in this embodiment may also be increased, so as to further subdivide the water cooling channel 16, increase the flow path of the cooling water, and improve the water cooling effect.
Specifically, as shown in fig. 6 to 8, the hanger 4 is connected to the outside of the air-cooled duct 11 in this embodiment. Hang 4 and can be used to install the motor, can be firm through hanging 4 and install the high-power permanent magnet traction motor that this embodiment provided on the motor car to in this embodiment, hang 4 and be located the outside of air-cooled passageway 11, air-cooled passageway 11 is located the outside of water-cooled passageway 16, and casing 1 is whole to be divided into three-layer welded structure, makes the motor have better intensity and rigidity in order to satisfy the vibration requirement in the actual operation of high-power permanent magnet traction motor. It should be understood that the hanger 4 described in the present embodiment is not limited to the structure described in fig. 6 to 8, and other mounting forms may also be adopted, for example, the hanger 4 may also include two studs fixed to the motor casing 1, and a clamping plate is fixed between the studs, and when mounting, the clamping plate is clamped on the corresponding component of the locomotive and fastened by bolts, so as to achieve the suspension positioning of the motor.
Specifically, the section of the casing 1 in the present embodiment, which is perpendicular to the extending direction of the rotating shaft 31, is a regular polygon, and the air cooling passages 11 are disposed at four corners of the outer side of the water cooling passage 16. Through the arrangement mode, under the condition that the size of the shell of the motor is not changed, the space inside the motor is fully utilized for heat dissipation, and meanwhile, the heat dissipation capacity of the high-power permanent magnet traction motor is improved to the maximum extent in a limited space by adopting the internal water cooling channel and the external air cooling channel.
The interface of the casing 1 perpendicular to the extending direction of the rotating shaft 31 may be a regular octagon, or may be another regular polygon, which is not limited in this embodiment.
Specifically, the rotor assembly 3 in this embodiment includes a rotating shaft 31 and a rotor body 33 disposed on the rotating shaft 31, the rotor body 33 is provided with a first air duct penetrating along an extending direction of the rotating shaft 31, and the first air duct is uniformly disposed in a plurality around the rotating shaft 31. After penetrating through rotor body 33 through first wind channel, and then communicate first cavity 14 and second cavity 15 that are located rotor subassembly 3 both sides with motor inside, when both ends flow about first wind channel, the heat distribution between first cavity 14 and second cavity 15 is balanced.
In a specific implementation, the rotor body 33 may include a rotor core and a rotor winding, and when the motor is a permanent magnet motor, the rotor winding may be replaced by a permanent magnet installed on the rotor core, and optionally, the permanent magnet may adopt a built-in magnetic pole type structure, or alternatively, an external magnetic pole type structure.
The first air duct is disposed on the rotor core, and optionally, the first air duct may be a straight air duct, or may also be a curved air duct, which is not limited in this embodiment. Through setting up a plurality of first wind channels, still help lightening rotor core's weight, and then improve rotor core's rotational speed upper limit.
Specifically, the blades 311 in this embodiment are axial flow blades, and the guide ring 312 is disposed behind the axial flow blades in the airflow direction, and the guide ring 312 guides the airflow to flow toward the air cooling duct 11. By arranging the axial flow blades and the guide ring 312, the flowing direction of air is effectively limited, so that the air in the installation space flows to the inside of the air cooling channel 11 in a concentrated manner, and the flowing efficiency of the air is improved.
The air flow direction of the axial flow blade is specifically as follows: the axial flow blades rotate to form a rotating plane, and air flows along the axial direction of the rotating plane. The guide ring 312 may be welded to the axial flow blades to define an outflow direction of air.
In this embodiment, two ends of the rotating shaft 31 are mounted on the casing 1 through bearings 5, the rotating shaft 31 is mounted with a sealing cover 6 for isolating the bearings 5 from the mounting space, the sealing cover 6 and the casing 1 form a cooling space 51 surrounding the bearings 5, and the casing 1 is provided with an air inlet channel 52 and an air outlet channel 53 penetrating the cooling space 51. Through setting up cooling space 51, the air can flow in cooling space 51, and then realizes the cooling effect to the bearing, prevents that the bearing from leading to the high temperature because of the heat accumulation that the main shaft produced when rotating, and then influences the lubricating property of bearing.
In a specific implementation, a shaft hole is formed in the first end cover 12 on the casing 1, a part of the rotating shaft 31 extends out of the shaft hole, and the bearing 5 is disposed near the shaft hole, specifically, an annular groove surrounding the shaft hole may be disposed near the shaft hole, and the bearing 5 is heat-sleeved in the annular groove. A sealing cover 6 is arranged on the inner side of the first end cover 12, the sealing cover 6 is sleeved on the rotating shaft 31, the inner wall of the first end cover 12 is sunken, and the opening of the sunken part is sealed by the sealing cover 6, so that a cooling space 51 is formed.
An air inlet channel 52 communicated with the cooling space is formed on the outer wall of the first end cover 12, and an air outlet channel 53 communicated with the cooling space 51 is further formed on the outer wall of the first end cover. Cooling space 51, inlet air channel 52 and air-out channel 53 constitute bearing air-cooled passageway jointly, and wherein, air-out channel 53 or inlet air channel 52 are close to bearing 5 and set up, and then make bearing air-cooled passageway be close to bearing 5 to make bearing 5's heat can be more quick transmit to bearing cooling air in the wind channel, improve the cooling effect to bearing 5. In this embodiment, the second end cover 13 may be provided with a bearing cooling air duct similar to the first end cover 12, and the inner side of the second end cover 13 may also be provided with the sealing cover 6, which is not described in detail in this embodiment.
Alternatively, an air driving device may be disposed outside the first end cap 12 and the second end cap 13, for example, a cooling fan may be disposed, the cooling fan drives air to flow in the bearing cooling air duct when operating, and the cooling fan may be in transmission connection with the rotating shaft 31 of the motor; alternatively, a separate energy supply may be used.
The air inlet channel 52 can be provided with a plurality of air outlet channels 52 which are distributed around the rotating shaft 31 to increase the air inlet amount; the air outlet channels 53 can also be provided in a plurality, and the air outlet channels 53 are distributed around the rotating shaft 31 to increase the air outlet amount.
The sealing cover 6 rotates with the rotation shaft 31 and has a sheet-like projection 61 for driving the air flow in the cooling space 51. By arranging the sheet-shaped protrusion 61 and rotating the sealing cover 6 along with the rotating shaft 31, the power of the motor and the energy source are utilized to drive the air to flow in the cooling space 51, and an energy supply structure is not required to be additionally arranged.
Specifically, the sheet-shaped protrusion 61 in this embodiment may be a centrifugal fan blade, and the centrifugal fan blade forms a rotation plane when rotating, and the air is absorbed by the axial direction of the rotation plane and exhausted by the circumferential direction of the rotation plane, so the axial direction of the rotation plane may be regarded as the air inlet end of the centrifugal fan blade, and the circumferential direction of the rotation plane may be regarded as the air outlet end of the centrifugal fan blade. The end of the air inlet channel 52 is aligned with the air inlet end of the centrifugal fan blade, and the end of the air outlet channel 53 is aligned with the air outlet end of the centrifugal fan blade, so that the air flow is realized.
In a possible implementation manner, the axial flow blades in this embodiment may also be disposed on one side of the sealing cover 6 located in the installation space, the guide ring 312 is disposed on one side of the sealing cover 6 facing the installation space, the two sides form an annular cavity, the axial flow blades are mounted in the annular cavity, one end of each axial flow blade is connected to the side wall of the sealing cover 6 located in the installation space, the other end of each axial flow blade is connected to the side wall of the guide ring 312 facing the sealing cover 6, the axial flow blades are disposed in a plurality, the axial flow blades are disposed around the rotating shaft 31, when the sealing cover 6 rotates along with the rotating shaft 31, the corresponding axial flow blades rotate along with the rotating shaft to drive the air to flow, and the flow direction controlled by the guide ring 312 is limited, so that the air.
The high-power permanent magnet traction motor provided by the embodiment further provides a heat dissipation cooling effect inside the motor through air-water cooling combined cooling, so that the power density of the high-power permanent magnet traction motor is effectively provided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An air-water cooling high-power permanent magnet traction motor with a hanging structure is characterized by comprising a shell, a stator assembly and a rotor assembly; the machine shell surrounds and forms an installation space for installing the stator assembly and the rotor assembly, and an air cooling channel communicated with the installation space is formed in the machine shell; the rotor assembly comprises a rotating shaft, and blades for driving air in the installation space to flow to the air cooling channel are arranged on the rotating shaft.
2. The traction motor as claimed in claim 1, wherein the casing is provided with a water cooling channel for heat exchange with the air cooling channel, and further provided with a water inlet and a water outlet communicated with the water cooling channel for inlet and outlet of cooling water.
3. The permanent magnet traction motor of claim 2, wherein water channel ribs are provided inside the water cooling channel to extend a circulation path of the cooling water.
4. The traction motor as claimed in claim 2 or 3, wherein the water cooling channel is an annular channel surrounding the rotating shaft, and the cooling air duct is disposed outside the water cooling channel.
5. The permanent magnet traction motor according to claim 4, wherein a hanger is connected to the outside of the air-cooled channel.
6. The traction motor as claimed in claim 5, wherein the cross section of the casing perpendicular to the extension direction of the rotating shaft is a regular polygon, and the air cooling channels are disposed at four corners of the outer side of the water cooling channel.
7. The permanent magnet traction motor according to claim 1, wherein the rotor assembly comprises the rotating shaft and a rotor body arranged on the rotating shaft, the rotor body is provided with a first air duct penetrating along the extending direction of the rotating shaft, and a plurality of first air ducts are uniformly arranged around the rotating shaft.
8. The traction motor as claimed in claim 1, wherein the blades are axial blades, and a guide ring is disposed behind the axial blades in the airflow direction, and guides the airflow to flow toward the air-cooled channel.
9. The permanent magnet traction motor according to claim 1, wherein two ends of the rotating shaft are mounted to the housing through bearings, a sealing cover for isolating the bearings from the mounting space is mounted to the rotating shaft, the sealing cover and the housing form a cooling space surrounding the bearings, and the housing is provided with an air inlet channel and an air outlet channel which are communicated with the cooling space.
10. The permanent magnet traction motor of claim 9 wherein said seal cap rotates with said shaft and has a tab-like protrusion for driving air flow in said cooling space.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271502.7A CN112994355A (en) | 2019-12-12 | 2019-12-12 | Air-water cooling high-power permanent magnet traction motor with hanging structure |
| PCT/CN2020/098008 WO2021114606A1 (en) | 2019-12-12 | 2020-06-24 | Air- and water-cooled high-power permanent magnet traction motor having a hanging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271502.7A CN112994355A (en) | 2019-12-12 | 2019-12-12 | Air-water cooling high-power permanent magnet traction motor with hanging structure |
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| Publication Number | Publication Date |
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| CN112994355A true CN112994355A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911271502.7A Pending CN112994355A (en) | 2019-12-12 | 2019-12-12 | Air-water cooling high-power permanent magnet traction motor with hanging structure |
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| Country | Link |
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| CN (1) | CN112994355A (en) |
| WO (1) | WO2021114606A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231471A1 (en) * | 2023-02-24 | 2023-12-07 | 皖西学院 | Electric motor structure capable of reducing temperature rise of bearing, and manufacturing method therefor |
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| CN117477858B (en) * | 2023-10-09 | 2024-05-17 | 无锡欧瑞京机电有限公司 | Air-water cooled motor of half-and-half spliced type machine base |
| CN117614186B (en) * | 2023-12-05 | 2024-05-14 | 江苏微特利电机股份有限公司 | Permanent magnet motor system for pure electric logistics vehicle and installation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113681Y (en) * | 2007-07-16 | 2008-09-10 | 南车株洲电力机车研究所有限公司 | Composite cooling structure for driving motor |
| CN102983680A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Air and water hybrid cooling high-speed permanent-magnet motor |
| KR101394600B1 (en) * | 2010-04-21 | 2014-05-15 | 현대중공업 주식회사 | Cooling system of water jacket style generator |
| CN106712367A (en) * | 2016-11-29 | 2017-05-24 | 中车永济电机有限公司 | High speed train totally enclosed type permanent magnetic traction motor |
| CN108539889A (en) * | 2018-03-30 | 2018-09-14 | 合肥巨动力系统有限公司 | A kind of permanent-magnetic synchronous motor rotor air-cooled structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201238241Y (en) * | 2008-07-29 | 2009-05-13 | 上海南洋电机有限公司 | Double-cooling circuit structure of water-cooling electric motor |
| CN101499702A (en) * | 2009-02-27 | 2009-08-05 | 山西防爆电机（集团）有限公司 | Compact water-cooling three phase asynchronous motor |
| KR101276065B1 (en) * | 2009-09-08 | 2013-06-14 | 현대중공업 주식회사 | Cooling system of water jacket style generator |
| CN102769356B (en) * | 2011-05-05 | 2014-10-15 | 株洲南车时代电气股份有限公司 | Permanent magnet synchronous traction motor with air cooling structure and air cooling method of permanent magnet synchronous traction motor |
| CN202034857U (en) * | 2011-05-18 | 2011-11-09 | 三一电气有限责任公司 | Motor |
| CN103280927A (en) * | 2013-06-18 | 2013-09-04 | 天津市隆诚泰铝业有限公司 | Water-cooled motor casing double-cooling-circuit structure |
| JPWO2015008390A1 (en) * | 2013-07-19 | 2017-03-02 | 株式会社東芝 | Liquid-cooled electric motor |
-
2019
- 2019-12-12 CN CN201911271502.7A patent/CN112994355A/en active Pending
-
2020
- 2020-06-24 WO PCT/CN2020/098008 patent/WO2021114606A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113681Y (en) * | 2007-07-16 | 2008-09-10 | 南车株洲电力机车研究所有限公司 | Composite cooling structure for driving motor |
| KR101394600B1 (en) * | 2010-04-21 | 2014-05-15 | 현대중공업 주식회사 | Cooling system of water jacket style generator |
| CN102983680A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Air and water hybrid cooling high-speed permanent-magnet motor |
| CN106712367A (en) * | 2016-11-29 | 2017-05-24 | 中车永济电机有限公司 | High speed train totally enclosed type permanent magnetic traction motor |
| CN108539889A (en) * | 2018-03-30 | 2018-09-14 | 合肥巨动力系统有限公司 | A kind of permanent-magnetic synchronous motor rotor air-cooled structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231471A1 (en) * | 2023-02-24 | 2023-12-07 | 皖西学院 | Electric motor structure capable of reducing temperature rise of bearing, and manufacturing method therefor |
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| WO2021114606A1 (en) | 2021-06-17 |
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Application publication date: 20210618 |